Study on high-pressure and temperature elasticity of subducted crustal materials and lower mantle chemical heterogeneity
| Project/Area Number |
23540560
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Ehime University |
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Principal Investigator |
TSUCHIYA Taku 愛媛大学, 地球深部ダイナミクス研究センター, 教授 (70403863)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 第一原理電子状態計算 / 沈み込んだ地殻物質 / 下部マントルの不均質性 / 高圧相転移 / 地震波速度 / マントルの不均質性 / マントルの進化 |
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| Research Abstract |
The density and elasticity of the major crustal minerals in the deep mantle pressure condition were determined using the density functional first principles computation method. Based on the calculated results, potential subduction of the crustal materials into the deep mantle, their stable distribution in the mantle, and influences on the mantle dynamics were discussed.
It was found that each typical crustal material could reach the lowermost mantle and cause the chemical heterogeneity, but their stable stratification is less likely when considering the time scale of the basal heating from the outer core and the internal heating. Instead they would likely be involved in the global mantle convection. This suggests that while the crust formation is a differentiation process of the mantle, the subduction generally serves as an assimilation process.
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Report
(4 results)
Research Products
(111 results)
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[Presentation] 第2大陸の役割2014
Author(s)
河合研志, 市川浩樹, 山本伸次, 土屋卓久, 丸山茂徳
Organizer
日本地球惑星科学連合
Place of Presentation
横浜
Year and Date
2014-04-29
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[Presentation] 膨張収縮地球2013
Author(s)
土屋卓久, 河合研志, 丸山茂徳
Organizer
日本地球惑星科学連合
Place of Presentation
幕張
Year and Date
2013-05-24
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[Presentation] 第2大陸2011
Author(s)
河合研志, 山本伸次, 土屋卓久, 丸山茂徳
Organizer
日本地球惑星科学連合
Place of Presentation
幕張
Year and Date
2011-05-23
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[Presentation] 膨張収縮地球
Author(s)
土屋卓久, 河合研志, 丸山茂徳
Organizer
日本地球惑星科学連合2013年大会
Place of Presentation
幕張
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[Book] 地球の物理学辞典2013
Author(s)
本田了, 歌田久司, 大久保修平, 栗田敬, 土屋卓久, 中井俊一, 平賀岳彦, 宮武隆, 吉澤和範
Total Pages
536
Publisher
朝倉書店
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